<?php
define('DB_HOST','localhost');
define('DB_USER','dpz');
define('DB_PASS','123456');
define('DB_NAME','review_app');

//新建连接
$conn = new mysqli(DB_HOST,DB_USER,DB_PASS,DB_NAME);

//检查连接
if($conn->connect_error){
    die("连接失败" .$conn->connect_error);
}

echo "连接成功！";